[pve-devel] [PATCH docs 2/2] storage: rbd: document KRBD map options property

[Friedrich Weber]

Describe the new `krbd-map-options` property, and mention under which
circumstances the `rxbounce` option may be necessary.

Signed-off-by: Friedrich Weber <f.weber at proxmox.com>
---
 pve-storage-rbd.adoc | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pve-storage-rbd.adoc b/pve-storage-rbd.adoc
index 5fe558a..71fbc02 100644
--- a/pve-storage-rbd.adoc
+++ b/pve-storage-rbd.adoc
@@ -56,6 +56,16 @@ Enforce access to rados block devices through the krbd kernel module. Optional.
 
 NOTE: Containers will use `krbd` independent of the option value.
 
+krbd-map-options::
+
+Comma-separated list of additional map options for KRBD, see the Ceph docs.
+footnote:[Kernel RBD (KRBD) options
+{cephdocs-url}/man/8/rbd/#kernel-rbd-krbd-options] Optional.
++
+Currently, only the `rxbounce` option is supported. In case the pool hosts
+Windows VM disks, setting `rxbounce` can be necessary to avoid performance
+degradation and `bad crc/signature` warnings in the host journal.
+
 .Configuration Example for a external Ceph cluster (`/etc/pve/storage.cfg`)
 ----
 rbd: ceph-external
-- 
2.39.5